I suppose we need to establish what is considered old. Surely Feelings sung by Shirly Bassey. Would that be considered too old as a Rumba. Have you seen Donnie Burns and Gaynor on You Tube, dancing to the Greatest Performasnce Of My life, also by Shirly Bassey. Would those two songs be consdered too old . Both of those songs are not true Rumbas, But the Feeling is there and it brings out the Performances. Let us not forget that a true Latin Orchestra has in it many more instuments than an ordinary orchestra which have not. I think one of them is called a Caracas, as well as a thing that sounds like a lot of rice being shaken in a ball type instrument.